Merge branch 'glenn/file-system' of https://github.com/adobe/brackets into glenn/file-system
Fix for adobe/brackets#5426
Remove preferences migration code
Convert file system to use callbacks instead of promises.
Fix Tests for non English locales
Make the project-dropdown-toggle toggle the dropdown menu
Added close button to inline editor
Fix new file (in project).
Add error codes.
Changed live preview error message to match sprint 32
Revert some whitespace changes
Make 'find in files' search unsaved contents.
Error name cleanup. FileSyncManager cleanup.
Fix file watching
Remove FileSystem.pathExists(). Fix a bunch of unit test failures.
Use DocumentManager.getDocumentForPath() for find in files. Commented out for now since it is 3x slower.
Removed unnecessary part since a CodeMirror issue was fixed
Update DragAndDrop for new file system.
Allow event propogation even when there is no dropdown item.
Merge pull request #4590 from sathyamoorthi/closeOthers2

"close others" extension added to default extensions directory.